kernel/include/arch/i686/paging.h


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#pragma once

#include <stddef.h>

struct page_directory_t { // 32 bits
    unsigned int present       : 1;
    unsigned int rw_flag       : 1;
    unsigned int access_lvl    : 1; //0 is for only ring0. 1 is for anybody.
    unsigned int write_through : 1;
    unsigned int cache_off     : 1;
    unsigned int accessed      : 1;
    unsigned int zero          : 1;
    unsigned int page_size     : 1;
    unsigned int unused        : 4;
    unsigned int tbl_addr      : 20;
};

struct page_table_t {  // 32 bits
    unsigned int present       : 1;
    unsigned int rw_flag       : 1;
    unsigned int access_lvl    : 1; //0 is for only ring0. 1 is for anybody.
    unsigned int write_through : 1;
    unsigned int cache_off     : 1;
    unsigned int accessed      : 1;
    unsigned int dirty         : 1;
    unsigned int zero          : 1;
    unsigned int global        : 1;
    unsigned int reserved      : 3;
    unsigned int phys_addr     : 20;
};

extern void ident_map_addr(void *addr, size_t len);
extern void ident_unmap_addr(void *addr, size_t len);